Current-sense amplifiers and fault-protection switches target remote RF LNAs

These devices monitor load current and provide an analog output voltage proportional to the sensed load current. They include accurate internal current-limiting circuitry to protect the input supply against both overload and short-circuit conditions. Two open-drain fault-indicator outputs notify the microprocessor when a short-circuit, open-load, or short-to-battery condition exists. The wide input supply voltage range (5V to 42V) makes the MAX16913 well-suited for providing phantom power to remote RF LNAs in automotive applications.

A fault-blanking feature enables the circuit to ignore momentary faults--such as those caused by the initial charging of a capacitive load when hot swapping--thus preventing false alarms to the system. These current-sense switches also feature built-in thermal-overload protection, short-to-battery detection during startup, and an enable control to put the devices into a low-power shutdown mode.

The MAX16913/MAX16913A are fully specified over the -40°C to +105°C temperature range. They are AEC-Q100 qualified and are available in a 16-pin QSOP package.

Pricing: Starts at $1.50 (1000-up, FOB USA).
Availability: Now.
Datasheet: Click here.

Maxim Integrated Products, www.maxim-ic.com